Die for making wire nasls



(No Model.)

B. H. .GBDGE.

DIE FOR MAKING WIRE NAILS.

iii...

m M w m WITNESSES:

ATTORNEY N. PETERS Phoko-Lithognlpher, Washmgton. D. c.

UNITED STATES PATENT Orrrcn.

BURTON H. GEDGE, OF COVINGTON, KENTUCKY.

DIE FOR MAKING WlRE NAiLS.

"GATI DN forming part of Letters Patent No. 338,730, dated IvIarch 30, 1886.

Application filed October 21, 1885. Serial No. 150,506. (No model.)

v To aZZ whom, it may concerm Be it known that I, BURTON II. GEDGE, a citizen of the United States, and a resident of the city of Govington, in the county of Kenton and State of Kentucky, have invented certain new and useful ln'iprovements in Dies for Forming Barbs, Oorrugations, or Ridges on NailfiVire, of which the following is a specification.

In the accompanying drawings, making part of this specification, Figure 1 represents a side elevation of the die ordinarily used in forming barbs or interrupted ridges on wire nails. Fig. 2 represents an edge elevation of the die shown in Fig. 1. Fig. 3 represents a magnified portion of the die and teeth shown in Fig. 2. Fig. i represents a side elevation of a die made accordingto my invention. Fig. 5 is an edge elevation of a couple of die-disks, illustrating my invention. Fig. 6 is a magnified view of a portion of the dies as shown in Fig. 5. Fig. 7 illustrates a port-ion of a wire nail as made by the dies shown in Figs. 1, 2, and 3. Fig. 8 shows a portion of a wire nail as made by the dies shown in Figs. 4, 5, and 6. Fig. 9 also showsa nail made by dies of my improved invention.

The principal features of my invention consist, first, in a novel preferred shape of the teeth of the dies, and, sccond,in a novel and useful die.

Heretofore the shape of the teeth of the dies has been such as shown in Figs. 2 and 3. It will be observed that among other noticeable points these teeth B in this die A are rough, very irregular in contour, that no two of them are alike, that the teeth B in the same transverse line are separated by an intervening lump or hump, O, which lies between said teeth at the bottom of the toothed groove or recess of the die A. These teeth also project above and beyond the periphery of the die, and more or less irregularly, as shown on die A in Fig. 1. The nail corrugations, barbs, or ridges formed on the nail by such dies are very irregular. Furthermore, the continuity of the barb, ridge, or projection is broken and prevented by the lump or hump 0.

My invention obviates these objections, and also affords many decided advantages. The preferred shape of the edge of each tooth B, as seen at the top and bottom outlines of Fig.

5, is concavely circular, and without any bump or hump 0 being present at the bottom of the groove of the die. admits of the barb, corrugation, or ridge formed on the nail by said die being continuous. \Vhen the ridge is continuous, particularly when of a spiral character, the nail has all the advantages of a screw, and where the teeth are beveled upward and outward on their lower side-viz., on the side toward the point and straight (or at right angles to the length of the nail) on the side to ward the nail, as shown in Fig. 9the nail enters the wood easily on the principle of the wedge, and the straight edge of the tooth braces against the wood an d resists the efforts to draw or to work the nail out from the wood into which it has been driven.

The mode of applying the nail to the dies is to run the nail, or wire out of which the nails are formed, between opposing dies, as shown in Fig. 2 by the solid and dotted lines.

I will now describe the second principal feature of my invention. The disk A is divided into two concentric disks, E E, preferably of equal. width. The edge of the disk is formed with the teeth substantially as shown in Figs. 5 and 6. In this way the edge of the disk is capable of forming the ridges, corrugations, or barbs on the nail for a quarter of the periphery or circumferential surface of the nail. Two of these disks placed together, as shown by the solid and the dotted linesin Fig. 5,form one die and in conjunction with an opposite die confronting said last-named die,beiug preferably made in two disks, substantially as shown in said Fig. 5.

The teeth on the disks B can be perfectly made and of any required form or standard. For example, teeth such as shown in Fig. 6 can be made upon disks B B, whereas they cannot be formed on a die such as A. (Shown in Fig. 2.)

It may be here remarked that the die shown in Fig. 2 consists of a single piece of metal, and there are two peripheral gutters containing rows of teeth out therein. These teeth cannot well be formed by machinery, and are made by hand by chiseling, and are, as heretofore stated, very imperfect and irregular. \Vhen the teeth on dieA, Fig. 2, are worn out, the periphery of the die must be cut away by Such a shape of tooth turning off the same until the original grooves and teeth are obliterated, and then new grooves are turned therein and new teeth formed. Where the die consists of two disks, as B B, the teeth can not only be formed therein by hand, but can also be formed by machinery. When the teeth of a disk, B, are worn or blunted, the teeth can be reformed without turning down the periphery of the die or obliterating the groove, but are deepened and pointed on the same general principle as the blunted teeth of a saw are sharpened. The periphery of the disk viewed as shown in Fig. 4: may be, as there shown, perfectly free from any projections extending beyond the edge of the periphery.

Another advantage arising from the presence of the disks B, when provided with teeth on both edges, consists in the fact that when the teeth on adjacent grooves of disks B are blunted the disks are reversed, so that the grooves which were on the outer edges of the disks would be brought into juxtaposition, ready to act upon the nail or wire out of which the nails are made. In forming the barbs, corrugations, or ridges by means of said disks B, the disks B, being arranged in pairs, are opposed substantially as shown in Fig. 5.

In the old description of dies formed as mentioned in relation to Figs. 2 and 3, the teeth being of irregular shape, will not all simultaneously and equally well resist the pressure to which they are subjected when the wire is applied to their cutting surfaces or edges,and many of said teeth will consequently be broken or injured immediately upon the dies being first used. Whereas, where the teeth are formed regularly and of an even size and pitch, as in my invention,sucl1 breakage of theteeth and of their edges is obviated.

The construction of the die in disks, as B, enables the teeth to be more perfectly and uniformly tempered than where they are present in a solid die, as shown in Fig. 2. The uniformity of the teeth as to size and shape also enables them to be more perfectly and uniformly tempered than when irregular as mentioned in relation to Figs. 1, 2 and 3.

\Vhile the various features of my invention are preferably employed together, one or more of said features may be employed without the remainder.

\Vhat I claim as new, and desire to secure by Letters Patent, is-

1. In dies for forming barbs. ridges, or corrugations on the wire, the teeth E, ooncavely curved on their edges and located in the groove of the die, substantially as and for the purpose specified.

2. The disk B, provided on its edges with teeth E, concave] y curved on their edges, substantially as and for the purposes specified.

3. The combination of four disks, B, each provided on its edges with teeth E, the outer edges of adjacent teeth on the respective disks forming a continuous concavely-curved edge, substantially as and for the purposes specified.

4. The combination of pairs of disks B B, I

each having at its edge the teeth E E, having curved edges, substantially as and for the purposes specified.

5. The die madein two disks,B B, each pro vided on both peripheral edges with teeth, substantially as and for the purpose specified.

BURTON H. GEDGF.

Witnesses:

.1110. W. STREHLI, M. M. SMITH. 

